Astronauts in Space to Discuss 20th Anniversary of International Space Station NASA astronaut Kate Rubins and cosmonauts Sergey Ryzhikov and Sergey Kud-Sverchkov of the Russian space agency Roscosmos will discuss their mission and the upcoming 20th anniversary of continuous human presence aboard the International Space Station during an in-orbit news conference at 11:10 a.m. EDT Friday, Oct. 30. http://www.nasa.gov/press-release/astronauts-in-space-to-discuss-20th-anniversary-of-international-space-station